Welding tool for front cover plate of impeller

Abstract

The utility model discloses a welding tool for a front cover plate of an impeller, which relates to the field of impeller assembly and comprises an air cylinder fixed on a bottom plate, an ejector plate connected and driven by the air cylinder is arranged above the bottom plate, a base is arranged above the ejector plate, the bottom plate and the base are supported by a plurality of guide pillars, and the guide pillars penetrate through the ejector plate; the blade positioning plate is fixed to the center of the base, and a plurality of blade positioning grooves are formed in the blade positioning plate and used for pre-positioning blades; the sliding assemblies are arranged on the base in a relatively sliding mode, the sliding assemblies correspond to the blades one to one, slotting tools are arranged at the ends, away from the blades, of the sliding assemblies, and the slotting tools are fixed to the ejector plate; and the buffer arranged at the end, close to the blade, of the sliding assembly radially compresses the blade. According to the utility model, the radial movement of the blade can be controlled during welding, and the relative position precision of the blade and the front cover plate is ensured.

Description

Technical Field

[0001] The utility model relates to the field of impeller assembly, in particular to an impeller front cover welding tool. Background Art

[0002] like Figure 1 、 2 As shown, when welding the existing impeller blades (4') and the impeller front cover (3'), the blades are placed in the blade fixing grooves (6') corresponding to the blade positioning blocks (5'). The impeller front cover is then placed on the blades, pressed tightly with the pressure plate (2'), and fixed with the screw (1'). In practice, the length of the blade fixing groove is 1-2 mm longer than the length of the blades. This is to facilitate the placement of the blades and to account for thermal expansion during welding. Therefore, the blades will have a radial swing margin along the impeller front cover in the blade groove, which will cause the actual position of each blade to fluctuate significantly after welding, which will have a certain impact on the efficiency of the water pump. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide an impeller front cover welding tool that can control the radial movement of the blades during welding and ensure the relative position accuracy of the blades and the front cover.

[0004] The purpose of the utility model is achieved through the following technical solutions: This impeller front cover welding tool includes:

[0005] The cylinder is fixed on the bottom plate, an ejector plate driven by the cylinder is arranged above the bottom plate, a base is arranged above the ejector plate, the bottom plate and the base are supported by a plurality of guide pillars, and the guide pillars pass through the ejector plate;

[0006] a blade positioning plate fixed at the center of the base, the blade positioning plate being provided with a plurality of blade positioning slots for pre-positioning the blades; and

[0007] A plurality of sliding assemblies are arranged on the base in a relatively sliding manner, and the sliding assemblies correspond to the blades one by one. A knife is provided at one end of the sliding assembly away from the blade, and the knife is fixed on the ejection plate. When the cylinder moves upward, the ejection plate drives the sliding assembly through the knife, so that the buffer provided at one end of the sliding assembly close to the blade radially presses the blade, and the movement direction of the buffer coincides with the tangential direction of the blade end.

[0008] As a further technical solution, the sliding assembly includes a fixed block installed on the base, a sliding groove is provided in the center of the fixed block for slidingly installing a push block, one end of the push block contacts and cooperates with the inserting knife through an inclined surface, and the other end of the push block is installed with a buffer through a buffer bracket.

[0009] As a further technical solution, ears A are provided on both sides of the push block for installing bolts, and ears B are provided on both sides of the fixed block. The bolts pass through ears A and B in sequence, and a reset spring is provided on the bolts between ears A and B.

[0010] As a further technical solution, the angle of the inclined surface is 45°.

[0011] As a further technical solution, a linear bearing is provided on the guide column for guidance, and the linear bearing is fixed on the lower surface of the ejector plate; a limit block is fixed at the position corresponding to each guide column on the lower surface of the base to limit the upward movement of the ejector plate.

[0012] As a further technical solution, the stroke of the buffer is equal to the stroke of the cylinder, and the stroke of the cylinder is adjusted according to the height of the limit block, so that the pressing force of the blade is adjusted by the buffer.

[0013] As a further technical solution, a mounting groove is provided on the base at a position corresponding to each sliding component, and the buffer bracket is placed in the corresponding mounting groove and slides along the mounting groove.

[0014] As a further technical solution, a knife fixing groove for fixing the knife is provided on the ejection plate, and a knife hole is provided on the base at a position corresponding to the knife fixing groove for avoiding the knife; the ejection plate is also fixed to the cylinder piston rod through the cylinder flange.

[0015] The beneficial effects of the utility model are:

[0016] 1. The inserting knife and the pushing block cooperate with the inclined surface to well press and position the radial positions of the six blades, ensuring the consistency of the positions of the six blades to the greatest extent and solving the problem of radial movement of the original tooling blades along the blade positioning block;

[0017] 2. After welding is completed, it is much more convenient to take and place the workpiece. The original tooling blade will be stuck in the positioning groove after radial thermal expansion after welding, and it is necessary to use external force to pry the workpiece open. The utility model does not require external force to pry open and can be directly taken out;

[0018] 3. The height of the limit block can be adjusted according to the actual state, thereby adjusting the stroke of the cylinder and the buffer to ensure that the buffer's clamping force is appropriate. The buffer protects the blades and achieves precise positioning during the clamping and welding process to avoid impact. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the prior art.

[0020] Figure 2 It is a structural schematic diagram of a blade positioning block in the prior art.

[0021] Figure 3 This is a schematic diagram of the main structure of the present utility model.

[0022] Figure 4 It is a schematic diagram of the top structure of the utility model.

[0023] Figure 5 It is a schematic diagram of the three-dimensional structure of the utility model.

[0024] Figure 6 It is a structural diagram of the sliding component in the utility model.

[0025] Figure 7 for Figure 6 AA cross-sectional view.

[0026] Figure 8 This is a structural diagram of the assembly of the sliding component and the base in the utility model.

[0027] Figure 9 This is a structural diagram of the assembly of the guide column and the ejector plate in the utility model.

[0028] Figure 10 This is a structural diagram of the blades and the front cover plate when being welded in the present invention.

[0029] Figure 11 This is a schematic diagram of the structure of the blades and the front cover after welding in the utility model.

[0030] Description of reference numerals: screw 1', pressing plate 2', impeller front cover 3', impeller blade 4', blade positioning block 5', blade fixing groove 6';

[0031] Locking screw 1, sliding assembly 2, inserting knife 3, base 4, limit block 5, ejector plate 6, cylinder flange 7, linear bearing 8, cylinder 9, guide column 10, base plate 11, blade 12, buffer 13, buffer bracket 14, slide 15, return spring 16, push block 17, bolt 18, fixing block 19, front cover 20, pressure cover 21, blade positioning plate 22, blade positioning groove 23, mounting groove 24, inserting knife hole 25, inserting knife fixing groove 26, ear A 27, ear B 28. DETAILED DESCRIPTION

[0032] The following is a detailed introduction to the present invention with reference to the accompanying drawings:

[0033] Example: As shown in the attached Figures 3 to 11As shown, the impeller front cover welding fixture includes a locking screw 1, a sliding assembly 2, a blade 3, a base 4, a limit block 5, an ejector plate 6, a cylinder flange 7, a linear bearing 8, a cylinder 9, a guide column 10, a base plate 11, a blade 12, a buffer 13, a buffer bracket 14, a slide groove 15, a return spring 16, a push block 17, a bolt 18, a fixing block 19, a front cover 20, a pressure cover 21, a blade positioning plate 22, a blade positioning groove 23, a mounting groove 24, a blade hole 25, a blade fixing groove 26, an ear A 27 and an ear B 28.

[0034] Reference Attachment Figure 3 、 5 The bottom of the cylinder 9 is fixedly mounted on the bottom plate 11. A ejector plate 6 is set above the bottom plate 11. The piston rod of the cylinder 9 is fixedly connected to the ejector plate 6 through the cylinder flange 7, so that the ejector plate 6 is driven up and down by the cylinder 9. A base 4 is set above the ejector plate 6. The bottom plate 11 and the base 4 are supported by four guide pillars 10, and the guide pillars 10 pass through the ejector plate 6. Figure 3 、 9 As shown, a linear bearing 8 is mounted on each guide post 10 for guidance. The linear bearing 8 is fixedly mounted on the lower surface of the ejector plate 6. A limit block 5 is fixedly mounted on the lower surface of the base 4 at a position corresponding to each guide post 10. The limit block 5 is used to limit the upward movement of the ejector plate 6.

[0035] like Figure 4 、 5 As shown, a blade positioning plate 22 (consistent with the blade positioning block structure in the prior art) is fixed at the center of the base 4 , and six blade positioning slots 23 are provided on the blade positioning plate 22 , which are used to pre-position the blades 12 .

[0036] Reference Attachment Figure 4 、 5 8. A mounting groove 24 is provided on the base 4 at a position corresponding to each blade 12 to facilitate installation of the sliding assembly 2. There are also six sets of sliding assemblies 2 corresponding to the blades 12. Figure 6 、 7 As shown in Figures 8 and 9, the sliding assembly 2 includes a fixed block 19 threadedly connected to the base 4. A sliding groove 15 is provided at the center of the fixed block 19. A push block 17 is slidably installed in the sliding groove 15. One end of the push block 17 (i.e., the end away from the blade 12) is in contact with the inserting knife 3 through an inclined surface (preferably, the angle of the inclined surface is 45°), and the other end of the push block 17 (i.e., the end close to the blade 12) is installed with a buffer 13 through a buffer bracket 14.

[0037] Further, such as Figure 8 、 9As shown, the ejector plate 6 has a blade-securing slot 26 for securing the blade 3. The base 4 has a blade-securing hole 25 corresponding to the blade-securing slot 26 to provide clearance for the blade 3. When the cylinder 9 moves upward, the ejector plate 6 drives the slide assembly 2 via the blade 3, causing the buffer 13 to radially compress the blade 12. The movement direction of the buffer 13 (push block 17) coincides with the tangential direction of the blade 12 end.

[0038] Preferably, refer to the attached Figure 6 、 8 , ears A27 are provided on both sides of the push block 17 for mounting bolts 18, ears B28 are provided on both sides of the fixing block 19, bolts 18 pass through ears A27 and ears B28 in sequence, and a return spring 16 is sleeved on the bolt 18 between ears A27 and ears B28. When the cylinder 9 (insert knife 3) retracts, the push block 17 (buffer 13) is reset under the action of the return spring 16. Figure 7 As shown, the inserting knife 3 and the pushing block 17 cooperate with each other by using the inclined surface, which can well press and position the radial positions of the six blades 12, and maximize the consistency of the positions of the six blades 12, solving the problem of radial movement of the original tooling blades along the blade positioning block.

[0039] Furthermore, the stroke of the buffer 13 is equal to the stroke of the cylinder 9, and the stroke of the cylinder can be adjusted according to the height of the limit block 5. Therefore, the stroke of the buffer 13 can be adjusted by simply changing the height of the limit block 5. The ejection force of the buffer 13 is closely related to the stroke, so the buffer 13 can also play a role in adjusting the pressing force of the blade 12.

[0040] As shown in the soft soil 8, during installation, the buffer bracket 14 is placed in the corresponding installation groove 24. When the push block 17 is activated, the buffer bracket 14 slides along the installation groove 24.

[0041] The working process of the present invention is as follows: When the cylinder 9 moves upward, the cylinder flange 7 drives the ejector plate 6 outward, guided by the four guide posts 10. The six blades 3 on the ejector plate 6 are pushed vertically upward. The blades 3 and the push block 17 engage with each other at an angle, so that the push block 17 slides inward along the chute 15. The direction of movement of the push block 17 coincides with the tangential direction of the end of the blade 12, and the buffer 13 is used to radially compress the blade 12. The buffer 13 effectively reduces the impact force exerted by the push block 17 on the blade 12, ensuring that all six blades 12 are slowly moved to the innermost end of the blade positioning groove 23. After welding is completed, the cylinder 9 descends, the blades 3 move downward, and the push block 17 is reset by the return spring 16.

[0042] Explanation of terms:

[0043] Buffer: A protective device that relies on hydraulic damping to slow down the object acting on it to a stop, similar to a nitrogen spring.

[0044] Positioning: Before starting processing, the workpiece must first occupy a correct position on the machine tool or in the fixture. This process is called positioning.

[0045] Clamping: In order to prevent the positioned workpiece from being displaced under the action of force and to keep it in the correct position during the processing, the workpiece needs to be pressed and clamped firmly. This process is called clamping.

[0046] It is understandable that for those skilled in the art, any equivalent replacement or change of the technical solution and the concept of the utility model should fall within the scope of protection of the claims attached to the utility model.

Claims

1. An impeller front cover welding tool, characterized in that: include: The cylinder (9) is fixed on the bottom plate (11). An ejection plate (6) connected and driven by the cylinder (9) is arranged above the bottom plate (11). A base (4) is arranged above the ejection plate (6). The bottom plate (11) and the base (4) are supported by a plurality of guide pillars (10), and the guide pillars (10) pass through the ejection plate (6). A blade positioning plate (22) is fixed at the center of the base (4), and a plurality of blade positioning grooves (23) are provided on the blade positioning plate (22) for pre-positioning the blades (12); and A plurality of sliding assemblies (2) are relatively slidably arranged on a base (4), and the sliding assemblies (2) correspond to the blades (12) one by one. A plunger (3) is arranged at one end of the sliding assembly (2) away from the blade (12), and the plunger (3) is fixed on an ejection plate (6). When the cylinder (9) moves upward, the ejection plate (6) drives the sliding assembly (2) through the plunger (3), so that a buffer (13) arranged at one end of the sliding assembly (2) close to the blade (12) radially presses the blade (12), and the movement direction of the buffer (13) coincides with the tangential direction of the end of the blade (12).

2. The impeller front cover welding tool according to claim 1, characterized in that: The sliding assembly (2) includes a fixed block (19) mounted on a base (4), a sliding groove (15) is provided at the center of the fixed block (19) for slidingly mounting a push block (17), one end of the push block (17) is in contact with the inserting blade (3) via an inclined surface, and the other end of the push block (17) is mounted with a buffer (13) via a buffer bracket (14).

3. The impeller front cover welding tool according to claim 2, characterized in that: Ears A (27) are provided on both sides of the push block (17) for mounting a bolt (18), and ears B (28) are provided on both sides of the fixing block (19). The bolt (18) passes through the ear A (27) and the ear B (28) in sequence, and a return spring (16) is sleeved on the bolt (18) between the ear A (27) and the ear B (28).

4. The impeller front cover welding tool according to claim 2, characterized in that: The angle of the inclined surface is 45°.

5. The impeller front cover welding tool according to claim 2, characterized in that: A linear bearing (8) is sleeved on the guide column (10) for guidance, and the linear bearing (8) is fixed on the lower surface of the ejection plate (6); a limiting block (5) is fixed at a position corresponding to each guide column (10) on the lower surface of the base (4) to limit the stroke of the upward movement of the ejection plate (6).

6. The impeller front cover welding tool according to claim 5, characterized in that: The stroke of the buffer (13) is equal to the stroke of the cylinder (9), and the stroke of the cylinder is adjusted according to the height of the limit block (5), thereby adjusting the pressing force of the blade (12) through the buffer (13).

7. The impeller front cover welding tool according to claim 2, characterized in that: The base (4) is provided with a mounting groove (24) at a position corresponding to each sliding component (2); the buffer bracket (14) is placed in the corresponding mounting groove (24) and slides along the mounting groove (24).

8. The impeller front cover welding tool according to claim 1, characterized in that: The ejector plate (6) is provided with a knife fixing groove (26) for fixing the knife (3), and a knife hole (25) is provided on the base (4) at a position corresponding to the knife fixing groove (26) for avoiding the knife (3); the ejector plate (6) is also fixed to the piston rod of the cylinder (9) through the cylinder flange (7).

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